Determination of ultratrace levels of gold in size-segregated atmospheric particle samples by LIF: towards an aerosol tracer
In this paper the results of selected methodologies for the determination of Au in size-segregated aerosols are reported. The spectroscopic method of detection used in the two cases under study was the two-colour laser-induced fluorescence (LIF) of Au atoms in a graphite furnace and an atmospheric pressure flame. In the first case, size-segregated aerosol samples, obtained with a cascade impactor, were sequentially analysed after acid digestion of the collection membrane. In the second case, a polydisperse aerosol is separated into the component size fractions with an electrostatic classifier, and the resulting monodisperse aerosol, of known aerodynamic diameter (0.01 - 1 um) introduced into the central channel of a miniature acetylene/air flame. The feasibility for real-time, on-line analysis of atmospheric aerosols was also investigated.
Bibliographic Reference: Paper presented: XXIX Colloquium Spectroscopicum Internationale, Leipzig (DE), August 27 - September 1, 1995
Availability: Available from (1) as Paper EN 39246 ORA
Record Number: 199611256 / Last updated on: 1996-10-29
Original language: en
Available languages: en